Shade-roller lock



W. C. MOORS.

SHADE ROLLER LocK.

APPLICATION FILED NOV. 4, 1919- Patented Jau. 27, 1920.

/l/f/f r/////////// y-g5] a l,

WITNESS eff ., UNITED sTATEs PATENT oEEioE.

WALTER C. MOORS, OF OWENSBORO, KENTUCKY, ASSIGNOR OF ONE-THIRD T 1V. I.PEDLEY ANI) ONE-THIRD TO ERNEST NORRIS, BOTH OF OWENSBORO, KENTUCKY.

SHADE-ROLLER Look.

Application filed November 4,1919.

To` all 'whom t may concern:

Be it known that I, WALTER C. Moons, a citizen of the United States, andresident of Owensboro, in the county of Daviess and State of Kentucky,have invented cert-ain new and useful improvements in Shade- RollerLocks; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to a. shade roller lock, and is particularly animprovement over the device shown in my Patent No. 1,242,362 grantedOct. 9, 1917.

It is the object of this invention to improve the lock to avoid theaccidental locking of the roller during normal Yspeeds of rotationthereof, yet to assure of the locking of the roller should it rotate atan excessive speed, so as to avoid the t flying up and injury to theshade.

A further object is the provision of a lug or stop finger extending froma shade roller bracket, and a dog so mounted on the roller as to engagesaid lug should the roller rotate at an abnormal. speed in winding upthe shade, in order to lock the roller and prevent possible tearing ofor injury to the shade.

A still further object is the provision of a novel and improved mountingfor the dog on the end of the roller to assure of the proper functioningthereof, and to enable the device to be readily applied to shade rollersalready in use.

1V ith the foregoing and other objects in view, which will be apparentas the description proceeds, the invention resides in the constructionand arrangement of parts hereinafter described and claimed, it beingunderstood that changes can be made within the scope of what is claimedwithout departing from the spirit of the invention.

The invention is illustrated in the accompanying drawing, wherein Figure1 is a front view of the improved shade roller lock.

Fig. 2 is a cross section on the line 2-2 of Fig. 1.

Fig. 3 is a longitudinal horizontal section on the line 3 3 of Fig. 1.

In the drawing, there is illustrated a portion of the shade roller 1 onwhich the shade 2 is Wound, said roller being provided at one end (notshown) with the usual pawl Specification of Letters Patent.

Patented Jan. 27, 1920.

serial no. 335.632.

4and ratchet device which releases by centrifugal action to permit theshade to be 'wound up as usual. The end of the roller shown has a pivotpin or spindle 3 mounted for rotation in the bracket 4 as usual, andthis end of the roller is provided with the lock.

1n carrying out the invention, the bracket 4 is provided with a lug orstop finger 5 eX- tending at right angles therefrom parallel with and atone side of the axis of the roller 1, for the engagement of the dog 6which is pivotally connected to the end of the roller 1. This dog 6, asshown, is disposed loosely between a pair of disks 7 and S, and ispivotally mounted on a pin yor rivet 9 secured to said disks. The disk 7is secured to the end of the roller, and may be a part of a capor'ferrule 10 fitted on the end of the roller. The central portions ofthe disks 7 and S are connected by a hub 11 through which the pin orspindle 3 entends, thereby uniting the disks. The disks can be easilyapplied to the end of the rollerover the pin or spindle 3 for installingthe device on the shade roller, and by substituting the ordinary bracketby the bracket 4 having` the lug 5, the device is ready to function. YThe outer edge of the dog 6 is curved` as at 12, and a curved leafspring 13 is disposed between the disks 7 and 8 and its basal endsecured to a web or portion 14 connecting the disks at the peripherythereof, a pin 15 or other means securing said spring against said web.The spring 13 is located within the outline of the disks and its freeend bears against the curved edge of the dog, thereby moving the doginwardly. The dog is provided at its free end with an angular abutment16, and between said abutment and pivot 9 has an inwardly extendingportion 17 arranged to fit the hub 11 to limit the inward movement ofthe dog with the abutment 16 bearing against a stop 5 or rivet 18connecting the disks 7 and 8 opposite to the web 14. rlfhe spring 13extends `in the same general direction as the dog and has its free endoverlapping the dog, so that the free end of the dog is unobstructed t0be capable of moving outwardly from between the disks.

During the normal speed of rotation of the roller l in winding up theshade 2, the spring 13 will resist the tendency of the dog 6 to swingoutwardly by centrifugal force, so that the roller will not be lockedaccidentally during the winding up of the shade. However, should theshade slip out of the hand or be otherwise released, as to have atendency to iiy up or wind up at an eX- cessive speed, the increasedspeed of rotation of the roller will result in the added centrifugalforce throwing the dog 6 outwardly so that its abutment 16 will passover and engage the lug 5, as seen in dotted lines in F ig. :2, therebylocking the roller against further rotation. This will avoid injury tothe shade, as well as avoiding the annoyance of unwindinfr same whencompletely wound up. By the provision of a single lug 5, the remainderof the circular path of the dog 6 is unobstructed, so that said dog isgiven a large arc in which it can move outwardly to a position to engagethe lug 5. The portion 17 in contacting with the pin or stop 18 willlimit the outward movement of the dog and, by pulling the shadedownwardly, the dog 6 will retreat back into the space between the disks7 and S under the pressure of the spring 13.

Having thus described the invention, what is claimed as new is 1. Aroller lock comprising a bracket having a lug extending therefrom, arotary member to move with the roller, a; dog carried by said member tomove outwardly by centrifugal force to contact with said lug, and meansfor resisting the outward movement of said dog until the member exceedsa predetermined speed of rotation.

2. A, roller lock comprising a bracket for the roller having a lugextending therefrom at an angle, a member to rotate with the roller, a:dog pivotally carried by said roller to swing outwardly and move intoabutment with said lugs, and a spring moving said dog inwardly andresisting the outward movement thereof until the member exceeds apredetermined speed of rotation.

3. A roller lock comprising a member to rotate with a roller, a dogcarried by said member to move outwardly by centrifugal force, a brackethaving a portion for the engagement of said dog when moved outwardly,and means for resisting the outward movement of said dog until therotation of said member exceeds a predetermined speed.

il. A roller lock comprising a pair of disks, one having means forattachment to a roller, a dog pivoted between said disks to swingoutwardly from between them, and a bracket having a yportion for theengagement of said dog when swung outwardly.

5. A roller lock comprising a pair of disks, one of them having meansfor attachment to the end of a roller, a dog pivoted between said disksto swing outwardly from between them, a bracket having a portion for theengagement of said dog when swung outwardly, and spring means betweensaid disks moving the dog inwardly and resisting the outward movementthereof, until the speed of rotation of the roller becomes eX- cessive.

G. A roller lock comprising -a pair of disks.l one of which has meansfor attachnient to the end of a roller, a dog pivoted between said disksto swing outwardly from between them, a bracket for the roller having alug entending at an angle across the edges of the disks, said dog havingan abutment at the free end to contact with said lug, and a leaf springsecured between'said disks and having its free end overlapping the outerportion of said dog and extending in the same general direction as thedog, said spring moving the dog inwardly and resisting the outwardmovement thereof, said disks and dog having portions to limit the inwardand outward movement of the doo'.

In testimony whereof l hereunto set my hand.

WALTER C. MOORS.

